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I have a Mamajamba hex tarp. I'm happy to go with DIY, but a friend recommended the Jacks-R-Better.

Thanks!

http://planetmath.org/equationofcate...usofvariations
"...the catenary, this marvelous graceful thing, this joy of physics, this perfect balance between rebellion and obedience, is God's own signature on earth. I think it pleases Him to see them raised.'' -- Mark Helprin, "Winter's Tale"